Editing Reverse MvM Beginners Guide (section)

==== Spawn Room ====
Many maps do not have gates or doors blocking the blue spawn area and will require you to add your own blockades.  This can be as simple as placing a forcefield in front of the spawn and killing it when the wave starts, or as complex as creating a moving gate using [https://developer.valvesoftware.com/wiki/Func_tracktrain func_tracktrain].  For our example, we'll be using a [https://developer.valvesoftware.com/wiki/Func_forcefield func_forcefield], an invisible wall which can be disabled and enabled when wave start/end relays trigger using some basic AddOutputs
<syntaxhighlight lang="cpp">
PointTemplates [$SIGSEGV]
{
	corelogic
	{
		NoFixup 1
		logic_auto 
		{
			"targetname" "mainrelay"
			"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
			
			"OnMapSpawn" "wave_start_relay*,AddOutput,OnTrigger spawnbarrier:Disable:0:-1,0,-1"
			"OnMapSpawn" "wave_finished_relay*,AddOutput,OnTrigger spawnbarrier:Enable:0:-1,0,-1"
		}
	}
	forcefield
	{  
		NoFixup 1
		func_forcefield
		{
			"targetname" "spawnbarrier"
			"origin" "2724.365479 -2303.941650 -143.139458"	// Rottenburg main spawn
			"angles" "0 90 0"
			"rendermode" "10"		// 10 = Don't render
			"TeamNum" "2"		// 2 for RED, 3 for BLU
			"mins" "-300 -300 -300"
			"maxs" "300 300 300"		// 300x300HU cube
		}
	}
}
</syntaxhighlight>
''<sup>* is a [https://developer.valvesoftware.com/wiki/Wildcard wildcard] that can be used to reference multiple entities with the same prefix.  It is limited to suffixes only (i.e. "*_start_relay*" would not work).</sup>'' 

For more complex maps with a lot of entities, it may be beneficial to strip away certain decorative elements of the map to avoid hitting the [https://developer.valvesoftware.com/wiki/Edict_t#Limitations edict limit] of 2048 while the wave is active (such as move_rope and keyframe_rope).